[R] Cross correlation/ bivariate/ mantel

[McClatchie, Sam (PIRSA-SARDI)]

Thanks Spencer

"Give a wo/man a fish and s/he becomes an aid dependent, give a wo/man a rod and s/he becomes a fisherman"

Sam 

>-----Original Message-----
>From: Spencer Graves [mailto:spencer.graves at pdf.com] 
>Sent: Tuesday, 23 May 2006 9:58 AM
>To: McClatchie, Sam (PIRSA-SARDI)
>Cc: r-help at stat.math.ethz.ch
>Subject: Re: [R] Cross correlation/ bivariate/ mantel
>
>	  RSiteSearch("mantel statistic") produced 27 hits for 
>me, but the first few suggested I might not find enlightenment there. 
>RSiteSearch("spatial statistics") returned 1064 hits, so I 
>restricted that to RSiteSearch("spatial statistics", 
>"functions").  The first of those was a director for the 
>'spdep' package.  A search for "Mantel" on that page 
>identified "plot.mc.sim:  Mantel-Hubert spatial general cross 
>product statistic".  I haven't tried it.  I know nothing more 
>about it than what I've already told you.
>
>	  I hope you'll forgive the terrible pun if I say that 
>I hope I not only gave you a fish, I showed you how I caught it.
>
>	  Best Wishes,
>	  Spencer Graves
>
>McClatchie, Sam (PIRSA-SARDI) wrote:
>>> Background:
>>> OS: Linux Ubuntu Dapper
>>> release: R 2.3.0
>>> editor: GNU Emacs 21.4.1
>>> front-end: ESS 5.2.3
>>> -----------------------------
>>> Colleagues
>>>
>> 	I have two spatial datasets (latitude,
>longitude, fish eggs) and (latitude, longitude, fish larvae) 
>at the same 280 stations (i.e. 280 cases). I want to determine 
>if the 2 datasets are spatially correlated. In other words, do 
>high numbers of larvae occur where there are high numbers of 
>eggs? I would like to calculate the cross correlation for 
>these bivariate data and calculate a Mantel statistic as 
>described on pg. 147 of Fortin and Dale 2005 "Spatial analysis".
>> 
>> 	My search of R packages came up with
>acf and ccf functions but I don't think these are what I want. 
>Does anyone know which spatial package I might find the 
>appropriate test, please?
>> 
>>> Best fishes
>>>
>>> Sam
>>> ----
>>> Sam McClatchie,
>>> Biological oceanography
>>> South Australian Aquatic Sciences Centre PO Box 120, Henley Beach 
>>> 5022 Adelaide, South Australia email 
>>> <mcclatchie.sam at saugov.sa.gov.au>
>>> Cellular: 0431 304 497
>>> Telephone: (61-8) 8207 5448
>>> FAX: (61-8) 8207 5481
>>> Research home page <http://www.members.iinet.net.au/~s.mcclatchie/>
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>> 
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>> 
>> 
>> 
>> 
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